Perhaps you should try some spelling variations:
nhiet tach » chiet tach
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc nhiet » hoc thiet, hoc nghien, hoc hien
tranh cua » doanh cua, manh cua
cua tong » cua cong, cua dong, cua nong
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
song van » hoang van, trong van, duong van
tan tap » toan tap, han tap, tan tat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nhiet tach - hanh tranh cua tong ((((cong tan) or (cong tac))) or (song van)) tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - hanh tranh cua tong ((((cong tan) OR (cong tac))) OR (song van)) tan tap.
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - hanh tranh cua tong ((((cong tan) or (cong tac))) or (song van)) tan tap*.